Process of making a fertilizer.



EMIL COL LETT, OF NOTODDEN, NORWAY.

PROCESS OF MAKING A FERTILIZER.

Specification of Letters Patent Patented May 19, 1908.

Application filed July 10, 1905. 7 Serial No. 269,081.

T all whom it may concern:

Be it'known'that I, EMIL COLLETT, a subject of Norway, residing atNotodden pr. Skien, Norway, have invented certain new and usefulImprovements in the Manufacture of Fertilizers; and I do hereby declarethe followingto be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itapper tainsflto make and use the same.

My invention relates to the production of a new and valuable fertilizerchiefly consisting of calcium nitrate.

As is well known, calcium nitrate is a very valuable fertilizer, but asit is in a very high degree hygrosco is, it is practically excluded frombeing usecF as such, because it cannot be evenly spread on the ground bymechanical means. Attem ts have heretofore been made to transform t ecalcium nitrate into a state in which it is not hygroscopic, that is tosay, into a state in which it will retain its.

powdery form.

My invention has for its object a very simple and effective means ofrodueing a calcium nitrate fertilizer whic scopic.

According to my invention calcium nitrate, either in crystallized formor-inisolution, is mixed withcalcium oXid, calcium sulfate,

(gypsum) or equivalent matter, and the mixture thereupon heated atatemperature' between 100 and 200 centigrade, If the calcium nitrate isin the form ofa solution, it is evident that the mixture, before it iscalcined, is suitably subjected to an evaporation process.

As a specific example, I take 100 parts by weight of calcium nitrate, ina substantially dry state, and mix it with parts of calcium hydroxid andheat it in a an to between 100 and 200 degrees centigra e.

is not hygroe I'When a solution is used, I take 200 kilos of calciumnitrate solution, containing about "150;.kilos Ca(NO,).',, and mix itwith kilos of lime (when lime is used) or 190 kilos-of burned'calciumsulfate (when calcium sulfate is used), or 100 kilosof calcium carbonate(when a carbonate is used), all finely ground or pulverized, thenevaporate to dryness and heat in a pan at a temperature between 100 and200 degrees centigrade.

The product resulting from the. heating process possesses thefertilizing qualities of I ure calcium nitrate, and at the same time 1snot hygroscopic; it retains its powdery state and is therefore asuitable fertilizer.

I claim- 1; A process of producing non-hygroscopic fertilizer containingcalcium nitrate, consisting in mixing calcium nitrate with calcium oxid,and heating the so obtained mixture to a temperature ust below that atwhich nitrogen is given off.

2. A process of producing a nomhygroscopic fertilizer containincalcium-nitrate, consisting in mixing a so ution of calcium nitrate withcalcium oxid, eva orating the moisture and heating the so 0 tainedmixture to a temperature just below that at which nitrogen is given off.

3. A process of producing a non-hygroscopic fertilizer, which consistsin mixing calcium nitrate with a fertilizing oxygen com pound ofcalcium, and heatingthe mixture to a temperature below that at whichnitrogen is given ofi.

In testimony that I claim the foregoing as my invention, I have signedmyname 1n presence of two subscnb wltnesses.

EM L COLLETT; Witnesses:

HENRY Bonnawron, ALFREI; J. BBYN.

